/**
 *    Copyright 2006-2017 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;

import static org.mybatis.generator.internal.util.StringUtility.stringHasValue;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class DeleteByPrimaryKeysElementGenerator extends
        AbstractXmlElementGenerator {

    private boolean isSimple;

    public DeleteByPrimaryKeysElementGenerator(boolean isSimple) {
        super();
        this.isSimple = isSimple;
    }

    @Override
    public void addElements(XmlElement parentElement) {
        XmlElement answer = new XmlElement("delete"); //$NON-NLS-1$
        //TODO://设置true
        boolean typeHandled = true;
        String typeHandlerString;
        answer.addAttribute(new Attribute(
                "id", introspectedTable.getDeleteByPrimaryKeysStatementId())); //$NON-NLS-1$
        String parameterClass;
        if (!isSimple && introspectedTable.getRules().generatePrimaryKeyClass()) {
            parameterClass = introspectedTable.getPrimaryKeyType();
        } else {
            // PK fields are in the base class. If more than on PK
            // field, then they are coming in a map.
            if (introspectedTable.getPrimaryKeyColumns().size() > 1) {
                parameterClass = "map"; //$NON-NLS-1$
            } else {
                parameterClass = introspectedTable.getPrimaryKeyColumns()
                        .get(0).getFullyQualifiedJavaType().toString();
            }
        }
        //类型为数组，不要填写
        /*answer.addAttribute(new Attribute("parameterType", //$NON-NLS-1$
                parameterClass));*/

        context.getCommentGenerator().addComment(answer);

        StringBuilder sb = new StringBuilder();
        sb.append("delete from "); //$NON-NLS-1$
        sb.append(introspectedTable.getFullyQualifiedTableNameAtRuntime());
        answer.addElement(new TextElement(sb.toString()));

        boolean and = false;
        for (IntrospectedColumn introspectedColumn : introspectedTable
                .getPrimaryKeyColumns()) {
            sb.setLength(0);
            if (and) {
                sb.append("  and "); //$NON-NLS-1$
            } else {
                sb.append("where "); //$NON-NLS-1$
                and = true;
            }

            sb.append(MyBatis3FormattingUtilities
                    .getEscapedColumnName(introspectedColumn));
            sb.append(" in "); //$NON-NLS-1$
            answer.addElement(new TextElement(sb.toString()));
            //TODO ：   应该是一定会有一个配置
            String collectionName = "list";
            String deleteBatchMethodType = context.getTableConfigurations().get(0).getProperty("deleteBatchMethodType");
            if(null !=deleteBatchMethodType){
                if("array".equals(deleteBatchMethodType)){
                    collectionName = "array";
                }
            }
            XmlElement outerForEachElement = new XmlElement("foreach");
            outerForEachElement.addAttribute(new Attribute("collection",collectionName));
            outerForEachElement.addAttribute(new Attribute("index","index"));
            outerForEachElement.addAttribute(new Attribute("item","item"));
            outerForEachElement.addAttribute(new Attribute("open","("));
            outerForEachElement.addAttribute(new Attribute("separator",","));
            outerForEachElement.addAttribute(new Attribute("close",")"));
            answer.addElement(outerForEachElement);
            outerForEachElement.addElement(new TextElement(getItemClause(introspectedColumn)));
        }

        if (context.getPlugins()
                .sqlMapDeleteByPrimaryKeyElementGenerated(answer,
                        introspectedTable)) {
            parentElement.addElement(answer);
        }
    }

    public static String getItemClause(
            IntrospectedColumn introspectedColumn) {
        StringBuilder sb = new StringBuilder();

        sb.append("#{"); //$NON-NLS-1$
        sb.append("item");
        sb.append(",jdbcType="); //$NON-NLS-1$
        sb.append(introspectedColumn.getJdbcTypeName());

        if (stringHasValue(introspectedColumn.getTypeHandler())) {
            sb.append(",typeHandler="); //$NON-NLS-1$
            sb.append(introspectedColumn.getTypeHandler());
        }

        sb.append('}');

        return sb.toString();
    }
}
